JP2016117971A - Fibrous active carbon multiple texture having water repellency - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fibrous active carbon multiple texture having high air permeability and tension strength, having large absorption property to organic solvent gas per a unit area, even when it is wet due to water and sweat, and having water repellency.SOLUTION: Provided is a fibrous active carbon multiple texture 3 having bulk density of 0.02-0.19 g/cm, dry basis weight of 60-250 g/m, having second class or higher water repellency measured by 7.2 water repellency test (spray test) of JISL1092(2009), and having high organic gas absorption property. A production method of the fibrous active carbon multiple texture for continuously or in a batch process, performing carbonization and activation processing, to the multiple texture formed of line of thread of a precursor fiber of the fibrous active carbon, is also provided. The fibrous active carbon multiple texture having tension strength of 10 N/5 cm or higher, is also provided. Application of water repellency is achieved by spraying a water repellent agent by a spray method, or performing impregnation processing.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fibrous activated carbon woven fabric obtained by carbonizing and activating a woven fabric of carbonized raw organic fibers, and relates to a fibrous activated carbon woven fabric having water repellency.

  Conventionally, it has been proposed to obtain a fibrous activated carbon by subjecting a raw material organic fiber that can be carbonized to carbonization treatment and activation treatment. Patent Document 1 proposes a knitted fabric fibrous activated carbon knitted fabric. According to this, a fibrous activated carbon knitted fabric that is flexible, excellent in workability, high in tensile strength, and good in handleability can be obtained. However, it has not been possible to satisfy high demands such as higher performance as a recent activated carbon fabric and higher workability in combination with other materials.

  In particular, the balance between adsorption performance, air permeability and strength was not sufficient. That is, when the dry basis weight of the fibrous activated carbon knitted fabric is increased in an attempt to increase the adsorption performance for the organic solvent gas per unit area, the density increases, the pressure loss increases, and the air permeability decreases.

  In addition, when assuming continuous industrial production, it was considered that if the strength of the fibrous activated carbon knitted fabric is insufficient because the tension is applied by shrinkage in the course direction during firing, it may be torn or cut. . Furthermore, it is difficult to obtain a fibrous activated carbon knitted fabric with curled ends at both ends, a shrinkage in the width direction that is unstable, a constant and stable width, a large variation in shrinkage, a large variation in dry basis weight, The stitch was bent and the quality of the product was inferior.

  Furthermore, these fibrous activated carbons are used in various applications due to the high adsorption and desorption speed of the gas due to the micropore structure originally developed by the micropores, and very large adsorption performance. When it gets wet with water, seawater, sweat, etc., it may not be able to fully demonstrate its practical performance when used as a filter or protective clothing.

JP 58-213615 A

  The present invention is intended to solve the problems of the prior art, and has high air permeability, high tensile strength, and high water repellency when adsorbed to organic solvent gas per unit area even when wet with water or sweat. The present invention intends to provide a fibrous activated carbon multi-woven fabric having:

As a result of intensive studies to solve the above problems, the present inventors have reached the present invention. That is, the present invention is as follows.
(1) It has a bulk density of 0.02 to 0.19 g / cm ³ , a dry basis weight of 60 to 250 g / m ² , and is a JIS L1092 (2009) 7.2 water repellency test (spray test). Fibrous activated carbon multi-woven fabric characterized by having a water degree of 2 or higher.
(2) The fibrous activated carbon multiple fabric according to (1), which has a tensile strength of 10 N / 5 cm or more.
(3) A protective garment using the fibrous activated carbon multiple fabric according to (1).
(4) The method for producing a fibrous activated carbon multiple woven fabric according to (1) or (2), wherein a multiple woven fabric comprising yarns of precursor fibers of fibrous activated carbon is carbonized and activated in a batch or continuous manner.

  The present invention is a fibrous activated carbon multiple woven fabric obtained by carbonizing and activating a multiple fabric of carbonized raw material organic fibers, having high air permeability, high tensile strength, good handleability, The present invention relates to a fibrous activated carbon multi-woven fabric which is rich in processability and has excellent organic gas adsorption performance even when wet with water or sweat. Specifically, the present invention relates to medical supplies such as masks, deodorizing pads, and deodorizing sheets, protective clothing that protects the body from harmful gases, various air purifiers, various adsorbing elements used in the liquid phase, and electric reaction fields such as various batteries. It is related with the fibrous activated carbon multiple fabric used for the electrode of this, the electrode for electric tanks, etc. In particular, when this fibrous activated carbon multi-woven fabric is processed by combining sheet materials or molded products with lamination, sticking, etc., there is little damage such as tearing or abrasion, high air permeability, and high water repellency of fibrous activated carbon multi-layer. It relates to textile.

It is the schematic which showed the gas-penetration resistance test method.

  The fibrous activated carbon multiple woven fabric of the present invention has the effect of being excellent in the balance of water repellency, flexibility, tensile strength, breathability, adsorption performance, etc. by making the woven structure a multiple woven fabric and further performing water repellency treatment. Have. For the process of obtaining a fibrous activated carbon woven fabric having a multi-woven woven structure (hereinafter sometimes referred to as “fibrous activated carbon multiple woven fabric”), the fibrous polymer precursor yarns are pre-multi-woven, and then carbonized / A method of activation to make a fibrous activated carbon multi-woven fabric is preferred. This is because it is extremely difficult to industrially manufacture the fibrous activated carbon multi-woven fabric by weaving the activated carbon fiber yarn because the strength of the activated carbon fiber yarn is weak.

  In order to obtain a flexible fibrous activated carbon sheet, a knitted fabric-like fibrous activated carbon sheet was preferred. However, a knitted fabric-like sheet has low tensile strength and is relatively free from tearing and abrasion. Likely to happen. On the other hand, the fibrous fibrous activated carbon sheet has high tensile strength but is inferior in flexibility, and if it is intended to increase the adsorption performance to the organic solvent gas per unit area, the dry basis weight must be increased, resulting in density. Increases, pressure loss increases, and air permeability decreases.

  Therefore, in the present invention, the fibrous activated carbon sheet has a multi-woven structure and is further subjected to water repellency treatment, thereby providing a fibrous activated carbon multiple having a good balance of water repellency, flexibility, tensile strength, air permeability, adsorption performance and the like. A woven fabric is obtained.

The bulk density of fibrous activated carbon multiple fabric of the present invention is ^{0.02~0.19g / cm 3, 0.05~0.18g / cm} 3 are preferred. If the bulk density is less than 0.02 g / cm ³ , weaving is difficult, and even if it can be woven, it tends to cause misalignment, and if it exceeds 0.19 g / cm ³ , the air permeability is lowered, which is not preferable.

Drying basis weight of the fibrous activated carbon multiple fabric of the present invention is a ^{60~250g / m 2, 70~200g / m} 2 is preferred. If the dry basis weight is less than 60 g / m ² , the adsorption performance is low and the protective property cannot be obtained, and it is not preferable, and if it exceeds 250 g / m ² , the physiological burden increases when used in protective clothing.

  The tensile strength of the fibrous activated carbon multiple fabric of the present invention is preferably 10 N / 5 cm or more. When the tensile strength is less than 10 N / 5 cm, for example, when it is industrially laminated with other fiber aggregates such as woven or knitted fabrics and nonwoven fabrics, tearing occurs due to mechanical stress applied to the fibrous activated carbon multi-woven fabric, and the productivity is greatly increased. Reduced and impractical. The upper limit of the tensile strength is not particularly limited, but is about 100 N / 5 cm.

  As precursor fibers of fibrous activated carbon, phenolic fibers, cellulose fibers, pitch fibers and PAN fibers are known, but in order to obtain a fibrous activated carbon multi-woven fabric with high tensile strength according to the present invention, fibrous fibers It is preferable that the precursor fiber of activated carbon is a phenol fiber.

  The thickness of the fibrous activated carbon multi-woven fabric of the present invention is preferably 0.3 to 3.0 mm, and more preferably 0.5 to 2.5 mm. If the thickness is less than 0.3 mm, the air permeability becomes low, which is not preferable. If the thickness exceeds 3.0 mm, the physiological burden increases when used in protective clothing, which is not preferable.

The air permeability of the fibrous activated carbon multiple fabric of the present invention is preferably 100 cm ³ / cm ² · s or more. If the air permeability is less than 100 cm ³ / cm ² · s, an increase in pressure loss occurs when used in a filter, and a problem such as a decrease in wearing feeling occurs when used in protective clothing. The upper limit of the air permeability is not particularly limited, but is preferably 1000 cm ³ / cm ² · s or less. This is because multiple woven fabrics exceeding 1000 cm ³ / cm ² · s cannot be woven.

The adsorption performance of the fibrous activated carbon multiple fabric of the present invention is preferably 30 to 200 g / m ² in terms of the adsorption performance of toluene described in Section 7.8 of JIS K1477 (2007) “Fibrous activated carbon test method”. / M ² is more preferable. When the toluene adsorption performance is less than 30 g / m ² , practical performance cannot be sufficiently exhibited when used as a filter or protective clothing. On the other hand, if clothing such as protective clothing is molded from a multi-woven fabric having a toluene adsorption performance exceeding 200 g / m ² , the weight of the garment increases when worn.

  Examples of the method for obtaining the fibrous activated carbon multiple fabric of the present invention include the following methods. As the precursor fiber of the fibrous activated carbon, phenol fiber is used, and the yarn of the precursor fiber may be either a spun yarn obtained from staple or a filament yarn, or a mixed yarn obtained by mixing the two. It doesn't matter. The single fiber fineness of the precursor fiber is preferably 1.1 dtex to 5.5 dtex, and the fineness of the precursor fiber yarn is preferably 197 to 885 dtex, more preferably 295 to 885 dtex. When the fineness of the yarn is less than 197 dtex, the density of the fibrous activated carbon multi-woven fabric after weaving, carbonizing and activating becomes dense, and sufficient air permeability cannot be obtained, and further, flexibility is insufficient and post-processing Or tearing or tearing during use.

  When weaving a raw material woven fabric using the yarn, in order to maintain the breathability of the fibrous activated carbon sheet and further to maintain the adsorption performance, it is necessary to use a multiple weave as the woven structure. When the woven structure is not a multi-woven structure but a plain woven fabric is superposed, the superposed surfaces are rubbed and the activated carbon powder falls off and a hole is opened, which is not practical. As an abrasion evaluation method, visual determination was made according to the JIS L1096 (2010) 8.19.4 D method (accelerator rotor method). In addition, fabrics that are laminated with plain woven fabric and laminated with a non-woven hot melt adhesive have a poorly flexible fiber activated carbon sheet because of the adhesive processing. It gets worse. The flexibility is preferably 10 mN · cm or less according to the JIS L1096 (2010) 8.21.2 B method (slide method).

In order to convert the obtained multi-woven fabric composed of precursor fibers into activated carbon, it is obtained by performing a carbonization / activation process in a batch or continuous manner. In consideration of obtaining uniformity in the fabric characteristics and adsorption performance of the obtained fibrous activated carbon multi-woven fabric and considering industrial productivity, it is preferable to perform carbonization and activation continuously. An active atmosphere containing water vapor, oxygen, carbon dioxide, etc., which is carbonized in an inert atmosphere at a temperature of 350 ° C. to 1000 ° C. and then reacts with carbon at a temperature of 500 ° C. to 1000 ° C. Activated and activated carbonized. In some cases, carbonization and activation can be performed simultaneously by controlling the atmospheric conditions. In addition, when the maximum reached temperature at the time of activation treatment, that is, activated carbonization, exceeds 1000 ° C., wrinkles may occur due to abnormal shrinkage, and the maximum reached temperature is preferably 1000 ° C. or lower. As a result, a fibrous activated carbon multiple fabric having a BET specific surface area of less than 1000 to 2000 m ² / g is obtained.

  The fibrous activated carbon multi-woven fabric of the present invention has a very high adsorption performance due to its high gas adsorption speed due to the micropore structure developed by the micropores inherently. However, when used as a filter or protective clothing, even if the fibrous activated carbon multiple fabric of the present invention gets wet by moisture condensation or sweat in the air, water repellency can be imparted to maintain high gas barrier properties. preferable. In order to maintain the performance even in the wet state when wet with water, sweat, etc., the water repellent degree according to JIS L1092 (2009) 7.2 water repellent degree test (spray method) It is preferable to have quaternary or higher. As a method of imparting water repellency, there are a method of spraying a water repellant by a spray method, a method of impregnating, and the like, and it is not particularly limited. The water repellent is not particularly limited, such as fluororesin, wax, cellulose reaction system, silicone resin, etc., and the amount of the water repellent is preferably 0.1 to 15 wt%, more preferably as the water repellent solid content. Is 0.5 to 5 wt%. This is because the degree of water repellency is low when the adhering amount is less than 0.1 wt%, and the adsorption performance decreases when it exceeds 15 wt%.

  Oil repellency may be imparted to the fibrous activated carbon multiple fabric of the present invention. The oil repellency in that case is preferably a grade 2 or higher, more preferably a grade 3 or higher, by the method according to AATCC Test Method 118-2002. This is because when it is lower than the second grade, the liquid organic chemical penetrates and the adsorption performance is lowered.

  The fibrous activated carbon multi-woven fabric of the present invention may be used in a single layer, but in order to reinforce and protect the fibrous activated carbon multi-woven fabric, a protective layer is laminated on both sides, and further an outer layer is laminated to adsorb. It can also be used for protective clothing as a sheet. The above-mentioned method of use is effective in that it has high air permeability, high tensile strength, good handleability, good processability such as laminating, and excellent organic gas adsorption performance, which are the characteristics of the fibrous activated carbon fabric of the present invention. It can be said that this is a preferred embodiment.

  Hereinafter, the present invention will be described in detail based on examples. However, the following examples do not limit the present invention, and all modifications made without departing from the gist of the preceding and following descriptions are all included in the technical scope of the present invention. In addition, the measurement and evaluation of the characteristic value in this invention were performed as follows.

(Fineness)
The fineness was determined in accordance with the method described in JIS L1015 (2010) 8.5.1 (positive fineness) b) Method B (simple method). The notation is in dtex (decitex) units.

(Weight)
The basis weight was measured in accordance with the method described in JIS L1096 (2010) 8.3.2 (mass per unit area in the standard state).

(Dry basis weight)
The dry basis weight was measured under conditions based on the method described in JIS L0105 (2006) 5.3.2 (absolutely dried sample or test piece).

(thickness)
The thickness was measured according to the method described in 8.4 (thickness) a) A method (JIS method) of JIS L1096 (2010). However, the pressure was 0.7 kPa.

(The bulk density)
The bulk density was calculated in accordance with the method described in 8.11 (apparent specific gravity and pore volume ratio) a) apparent specific gravity of JIS L1096 (2010). However, the bulk density of the fibrous activated carbon fabric was calculated using a dry basis weight.

(Tensile strength)
The tensile strength was measured according to the method described in 8.14.1 (JIS method) of JIS L1096 (2010).
In the case of woven fabric, the warp direction refers to the warp direction, and the weft direction refers to the weft direction. In the case of a knitted fabric, it refers to the wale direction and the course direction.

(Air permeability)
The air permeability was measured according to the method described in 8.26.1 A method (fragile type method) of JIS L1096 (2010).

(Flexibility)
The bending resistance was measured according to the method described in 8.21.2 B method (slide method) of JIS L1096 (2010).

(Toluene adsorption performance)
The toluene adsorption performance was measured in accordance with the method described in 7.8.2 (equilibrium adsorption amount) of JIS K1477 (2007).

(BET specific surface area)
The BET specific surface area was calculated by a calculation based on the one-point method of 7.1.4b) by measuring the nitrogen adsorption amount based on the method described in 7.1 of JIS K1477 (2007).

(Abrasion (dust removal))
Evaluation was performed in accordance with the method described in JIS L1096 (2010) 8.19.4 D method (accelerator type method). However, Cw-C-P1200 was used as the abrasive paper, and the appearance of the sample was visually determined when the rotating blade was rotated at a rotation speed of 1000 times / minute for 2 minutes (O: no significant change in appearance before and after abrasion, (Triangle | delta): Damage is seen, X: Damage is large and many perforations are seen).

(Water repellency)
The water repellency was measured according to the method described in 7.2 of the water repellency test (spray test) of L1092 (2009).

(Hatsu oil level)
The oil repellency was measured according to the method described in AATCC Test Method 118-2002.

(Gas penetration resistance)
An explanatory view of the gas permeation resistance test is shown in FIG. A sheet material in which the outer layer material 4 is stacked on the upper surface of the fibrous activated carbon fabric 3 is sandwiched between two glass cells (upper cell 1 and lower cell 2) having an internal volume of 150 cc, and the periphery is sealed with paraffin 5. As the outer layer material, a cotton fabric having a breathability of 16 cm ³ / cm ² · s, a mass of 125 g / m ² , a thickness of 0.3 mm, and a water repellency of 5th grade was applied. From the upper cell 1 of this test container, 10 μL of 3-methoxybutyl acetate as the test solution 6 is dropped on the outer layer material. This is put in a constant temperature box set at 25 ° C. ± 2 ° C., and the gas concentration on the lower cell 2 side is sampled with a syringe every predetermined time (after 1, 30, 60, 120, 180, 240 minutes), and gas chromatography is performed. The gas concentration permeated through the sheet material was measured by graphy (◯: penetrating concentration <1 ppm, Δ: penetrating concentration≈1 ppm, x: penetrating concentration> 1 ppm).

<Example 1>
Using Kinoor spun yarn (product number KY-01, count 20 / 2Ne) manufactured by Gunei Chemical Industry Co., Ltd. with a single fiber fineness of 2.2 dtex and a yarn fineness of 590 dtex, a drive density of 19, 19 pieces / 2.54 cm, A double woven fabric of weft 19, 19 / 2.54 cm was woven. This fabric has a basis weight of 190 g / m ² , a thickness of 1.02 mm, a bulk density of 0.19 g / cm ³ , a breathability of 252 cm ³ / cm ² · s, and a tensile strength of 361 N / 5 cm in the vertical direction and 348 N in the transverse direction. / 5cm.
The woven fabric was carbonized from normal temperature to 890 ° C. for 30 minutes in an inert atmosphere, and then activated for 90 minutes at a temperature of 890 ° C. in an atmosphere containing 12 wt% of water vapor. The obtained fibrous activated carbon double woven fabric has a dry basis weight of 113 g / m ² , a thickness of 0.95 mm, a bulk density of 0.12 g / cm ³ , a breathability of 203 cm ³ / cm ² · s, and a high tensile strength. It was strong with a direction of 25 N / 5 cm and a width direction of 20 N / 5 cm. The toluene adsorption performance is 52 g / m ^2, BET specific surface area of those having a 1321m ² / g and a high adsorption performance, bending resistance was as flexible and 8.3mN · cm. Furthermore, the wearability (dust removal property) was also good.
This fibrous activated carbon double woven fabric is pad-dried in a processing bath containing 3 wt% fluorine-based water repellent (Nuva N2114 manufactured by Clariant Co., Ltd.), and then subjected to fixing treatment at 170 ° C. 1 wt% was added. When this material was immersed in pure water for 1 minute, taken out and dehydrated, the water content of the material was 0%. As a result of evaluating the gas permeation resistance by overlaying the outer layer material on this material, it was found that the downstream side permeation concentration was <1 ppm and the gas permeation resistance was high.

<Example 2>
Using Kinoor spun yarn (product number KY-01, count 20 / 2Ne) manufactured by Gunei Chemical Industry Co., Ltd. having a single fiber fineness of 2.2 dtex and a yarn fineness of 590 dtex, a driving density of 13, 13 / 2.54 cm, A double woven fabric of weft 12, 12 / 2.54 cm was woven. This fabric has a basis weight of 124 g / m ² , a thickness of 0.99 mm, a bulk density of 0.13 g / cm ³ , a breathability of 497 cm ³ / cm ² · s, and a tensile strength of 242 N / 5 cm in the vertical direction and 226 N in the transverse direction. / 5cm.
The woven fabric was carbonized from normal temperature to 890 ° C. for 30 minutes in an inert atmosphere, and then activated for 90 minutes at a temperature of 890 ° C. in an atmosphere containing 12 wt% of water vapor. The obtained fibrous activated carbon double woven fabric has a dry basis weight of 72 g / m ² , a thickness of 0.95 mm, a bulk density of 0.08 g / cm ³ , and a breathability of 410 cm ³ / cm ² · s, and has a high tensile strength. It was strong with a direction of 16 N / 5 cm and a lateral direction of 13 N / 5 cm. Further, the toluene adsorption performance was 34 g / m ² , the BET specific surface area was 1350 m ² / g, which was high, and the bending resistance was flexible at 5.4 mN · cm. Furthermore, the wearability (dust removal property) was also good.
This fibrous activated carbon double woven fabric is pad-dried in a processing bath containing 3 wt% fluorine-based water repellent (Nuva N2114 manufactured by Clariant Co., Ltd.), and then subjected to fixing treatment at 170 ° C. 1 wt% was added. When this material was immersed in pure water for 1 minute, taken out and dehydrated, the water content of the material was 0%. As a result of evaluating the gas permeation resistance by overlaying the outer layer material on this material, it was found that the downstream side permeation concentration was <1 ppm and the gas permeation resistance was high.

<Example 3>
Using a kinoor spun yarn (product number KY-01, count 20/2 Ne) manufactured by Gunei Chemical Industry Co., Ltd. having a single fiber fineness of 2.2 dtex and a yarn fineness of 590 dtex, a driving density of 24, 21, and 24/2. A triple woven fabric of 54 cm, weft 23, 20, 23 / 2.54 cm was woven. This fabric has a basis weight of 337 g / m ² , a thickness of 1.55 mm, a bulk density of 0.22 g / cm ³ , a breathability of 205 cm ³ / cm ² · s, and a tensile strength of 647 N / 5 cm in the vertical direction and 626 N in the transverse direction. / 5cm.
The woven fabric was carbonized from normal temperature to 890 ° C. for 30 minutes in an inert atmosphere, and then activated for 90 minutes at a temperature of 890 ° C. in an atmosphere containing 12 wt% of water vapor. The obtained fibrous activated carbon triple woven fabric has a dry basis weight of 202 g / m ² , a thickness of 1.50 mm, a bulk density of 0.13 g / cm ³ , and a breathability of 152 cm ³ / cm ² · s, and the tensile strength is vertical. It was 51 N / 5 cm and the weft direction was 46 N / 5 cm. In addition, the toluene adsorption performance was 94 g / m ² , the BET specific surface area was 1350 m ² / g and the adsorption performance was high, and the bending resistance was 8.8 mN · cm, which was flexible. Furthermore, the wearability (dust removal property) was also good.
This fibrous activated carbon triple woven fabric is pad-dried in a processing bath containing 3 wt% fluorine-based water repellent (Nuva N2114 manufactured by Clariant Co., Ltd.), and then subjected to fixing treatment at 170 ° C., and 1 wt. %. When this material was immersed in pure water for 1 minute, taken out and dehydrated, the water content of the material was 0%. As a result of evaluating the gas permeation resistance by overlaying the outer layer material on this material, it was found that the downstream side permeation concentration was <1 ppm and the gas permeation resistance was high.

<Example 4>
Using Kinoru spun yarn (product number KY-01, count 20 / 2Ne) manufactured by Gunei Chemical Industry Co., Ltd. having a single fiber fineness of 2.2 dtex and a yarn fineness of 590 dtex, a driving density of 9, 8, 9/2. A triple woven fabric of 54 cm, weft 9, 9, 9 / 2.54 cm was woven. This fabric has a basis weight of 134 g / m ² , a thickness of 1.14 mm, a bulk density of 0.12 g / cm ³ , a breathability of 471 cm ³ / cm ² · s, and a tensile strength of 236 N / 5 cm in the vertical direction and 247 N in the transverse direction. / 5cm.
The woven fabric was carbonized from normal temperature to 890 ° C. for 30 minutes in an inert atmosphere, and then activated for 90 minutes at a temperature of 890 ° C. in an atmosphere containing 12 wt% of water vapor. The obtained fibrous activated carbon triple woven fabric has a dry basis weight of 79 g / m ² , a thickness of 1.1 mm, a bulk density of 0.07 g / cm ³ , and a breathability of 431 cm ³ / cm ² · s, and the tensile strength is vertical. It was 13 N / 5 cm and the weft direction was 15 N / 5 cm. The toluene adsorption performance is 43 g / m ^2, BET specific surface area of those having a 1550 m ² / g and a high adsorption performance, bending resistance was as flexible and 5.1mN · cm. Furthermore, the wearability (dust removal property) was also good.
This fibrous activated carbon triple woven fabric is pad-dried in a processing bath containing 3 wt% fluorine-based water repellent (Nuva N2114 manufactured by Clariant Co., Ltd.), and then subjected to fixing treatment at 170 ° C., and 1 wt. %. When this material was immersed in pure water for 1 minute, taken out and dehydrated, the water content of the material was 0%. As a result of evaluating the gas permeation resistance by overlaying the outer layer material on this material, it was found that the downstream side permeation concentration was <1 ppm and the gas permeation resistance was high.

<Comparative Example 1>
Using Kinoru spun yarn (product number KY-01, count 20 / 2Ne) manufactured by Gunei Chemical Industry Co., Ltd., having a single fiber fineness of 2.2 dtex and a yarn fineness of 590 dtex, a driving density of 38 yarns / 2.54 cm, weft 38 A plain / 2.54 cm plain fabric was woven. This fabric has a basis weight of 195 g / m ² , a thickness of 0.60 mm, a bulk density of 0.33 g / cm ³ , a breathability of 91 cm ³ / cm ² · s, and a tensile strength of 320 N / 5 cm in the vertical direction and 340 N in the transverse direction. / 5cm.
The woven fabric was carbonized from normal temperature to 890 ° C. for 30 minutes in an inert atmosphere, and then activated for 90 minutes at a temperature of 890 ° C. in an atmosphere containing 12 wt% of water vapor. The obtained fibrous activated carbon plain woven fabric has a dry basis weight of 115 g / m ² , a thickness of 0.56 mm, a bulk density of 0.21 g / cm ³ , and a tensile strength of 23 N / 5 cm in the vertical direction and 13 N / 5 cm in the horizontal direction. Although it was tough, it was a plain woven fabric and had a large bulk density, so its air permeability was as low as 78 cm ³ / cm ² · s. The toluene adsorption performance was 54 g / m ² , the BET specific surface area was as high as 1350 m ² / g, and the bending resistance was flexible at 8.8 mN · cm. Furthermore, the wearability (dust removal property) was also good.
This fibrous activated carbon plain fabric is pad-dried in a processing bath containing 3 wt% fluorine-based water repellent (Nuva N2114 manufactured by Clariant Co., Ltd.), then subjected to fixing treatment at 170 ° C., and 1 wt. %. When this material was immersed in pure water for 1 minute, taken out and dehydrated, the water content of the material was 0%. As a result of evaluating the gas permeation resistance by overlaying the outer layer material on this material, it was found that the downstream side permeation concentration was <1 ppm and the gas permeation resistance was high.

<Comparative Example 2>
Using Kinoru spun yarn (product number KY-01, count 20 / 2Ne) manufactured by Gunei Chemical Industry Co., Ltd. having a single fiber fineness of 2.2 dtex and a yarn fineness of 590 dtex, a driving density of 18 yarns / 2.54 cm, weft 18 A plain / 2.54 cm plain fabric was woven. This fabric has a basis weight of 88 g / m ² , a thickness of 0.55 mm, a bulk density of 0.16 g / cm ³ , a breathability of 701 cm ³ / cm ² · s, and a tensile strength of 173 N / 5 cm in the vertical direction and 161 N in the transverse direction. / 5cm.
The woven fabric was carbonized from normal temperature to 890 ° C. for 30 minutes in an inert atmosphere, and then activated for 90 minutes at a temperature of 890 ° C. in an atmosphere containing 12 wt% of water vapor. Two sheets of the obtained fibrous activated carbon plain fabric were overlapped. The resulting fibrous activated carbon plain fabric two-ply product has a dry basis weight of 104 g / m ² , a thickness of 1.0 mm, a bulk density of 0.10 g / cm ³ , a breathability of 304 cm ³ / cm ² · s, and a tensile strength. The vertical direction was 33 N / 5 cm and the horizontal direction was 45 N / 5 cm. The toluene adsorption performance is 46 g / m ^2, BET specific surface area of those having a 1264m ² / g and a high adsorption performance, bending resistance was as flexible and 5.3mN · cm. However, when only two plain woven fabrics were superposed, the superposed surfaces were rubbed and the activated carbon powder fell off and a hole opened, making it unusable for practical use.
This fibrous activated carbon plain fabric double-layered product is pad-dried in a processing bath containing 3 wt% fluorine-based water repellent (Nuva N2114 manufactured by Clariant Co., Ltd.), and then subjected to fixing treatment at 170 ° C. The solid content was 1 wt%. When this material was immersed in pure water for 1 minute, taken out and dehydrated, the water content of the material was 0%. As a result of evaluating the gas permeation resistance by overlaying the outer layer material on this material, it was found that the downstream side permeation concentration was <1 ppm and the gas permeation resistance was high.

<Comparative Example 3>
Using Kinoru spun yarn (product number KY-01, count 20 / 2Ne) manufactured by Gunei Chemical Industry Co., Ltd. having a single fiber fineness of 2.2 dtex and a yarn fineness of 590 dtex, a driving density of 18 yarns / 2.54 cm, weft 18 A plain / 2.54 cm plain fabric was woven. This fabric has a basis weight of 88 g / m ² , a thickness of 0.55 mm, a bulk density of 0.16 g / cm ³ , a breathability of 701 cm ³ / cm ² · s, and a tensile strength of 173 N / 5 cm in the vertical direction and 161 N in the transverse direction. / 5cm.
The woven fabric was carbonized from normal temperature to 890 ° C. for 30 minutes in an inert atmosphere, and then activated for 90 minutes at a temperature of 890 ° C. in an atmosphere containing 12 wt% of water vapor. Two sheets of the obtained fibrous activated carbon plain woven fabric were stacked and laminated with a non-woven hot melt adhesive made of an amide resin. The obtained fibrous activated carbon plain woven double-layer bonded product has a dry basis weight of 123 g / m ² , a thickness of 1.02 mm, a bulk density of 0.12 g / cm ³ , and a breathability of 285 cm ³ / cm ² · s, The strength was strong with a vertical direction of 41 N / 5 cm and a horizontal direction of 75 N / 5 cm. The toluene adsorption performance was 45 g / m ² and the BET specific surface area was as high as 1063 m ² / g. However, since two plain woven fabrics were bonded, the bending resistance was as high as 15.3 mN · cm, and the flexibility was poor.
This fibrous activated carbon plain woven double-layer bonded product is pad-dried in a processing bath containing 3 wt% fluorine-based water repellent (Nuva N2114 manufactured by Clariant Co., Ltd.), and then subjected to fixing treatment at 170 ° C. 1 wt% of the solid agent was added. When this material was immersed in pure water for 1 minute, taken out and dehydrated, the water content of the material was 0%. As a result of evaluating the gas permeation resistance by overlaying the outer layer material on this material, it was found that the downstream side permeation concentration was <1 ppm and the gas permeation resistance was high.

<Comparative example 4>
A milled knitted fabric was knitted with a 22 gauge double-sided circular knitting machine using Kinoor spun yarn (product number KY-04, count 20/1 Ne) manufactured by Gunei Chemical Industry Co., Ltd. having a single fiber fineness of 2.2 dtex and a yarn fineness of 295 dtex. . This knitted fabric has a basis weight of 230 g / m ² , a thickness of 1.60 mm, a density of 15 wal / 2.54 cm, 34 courses / 2.54 cm, a bulk density of 0.14 g / cm ³ , and a breathability of 305 cm ³ / cm ² · s. The tensile strength was 171 N / 5 cm in the vertical direction (wale direction) and 242 N / 5 cm in the transverse direction (course direction).
This knitted fabric was carbonized from normal temperature to 890 ° C. for 30 minutes in an inert atmosphere, and then activated for 90 minutes at a temperature of 890 ° C. in an atmosphere containing 12 wt% of water vapor. The obtained fibrous activated carbon knitted fabric had a dry basis weight of 113 g / m ² , a thickness of 1.10 mm, a bulk density of 0.10 g / cm ³ , and a breathability of 346 cm ³ / cm ² · s. The strength was as small as 7N / 5cm in the vertical direction and 5N / 5cm in the lateral direction. The toluene adsorption performance is 52 g / m ^2, BET specific surface area of those having a 1321m ² / g and a high adsorption performance, bending resistance was as flexible and 5.8mN · cm.
This fibrous activated carbon knitted fabric is pad-dried in a processing bath containing 3 wt% of a fluorine-based water repellent (Nuva N2114 manufactured by Clariant Co., Ltd.), and then subjected to fixing treatment at 170 ° C., and the water repellent solid content is 1 wt%. It was attached. When this material was immersed in pure water for 1 minute, taken out and dehydrated, the water content of the material was 0%. As a result of evaluating the gas permeation resistance by overlaying the outer layer material on this material, it was found that the downstream side permeation concentration was <1 ppm and the gas permeation resistance was high.

<Comparative Example 5>
Using Kinoor spun yarn (product number KY-01, count 20 / 2Ne) manufactured by Gunei Chemical Industry Co., Ltd. having a single fiber fineness of 2.2 dtex and a yarn fineness of 590 dtex, a driving density of 9, 9 pieces / 2.54 cm, A double woven fabric of weft 9, 9 / 2.54 cm was woven. This fabric has a basis weight of 90 g / m ² , a thickness of 0.75 mm, a bulk density of 0.12 g / cm ³ , a breathability of 883 cm ³ / cm ² · s, and a tensile strength of 174 N / 5 cm in the vertical direction and 163 N in the transverse direction. / 5cm.
The woven fabric was carbonized from normal temperature to 890 ° C. for 30 minutes in an inert atmosphere, and then activated for 90 minutes at a temperature of 890 ° C. in an atmosphere containing 12 wt% of water vapor. The obtained fibrous activated carbon double fabric had a dry basis weight of 52 g / m ² , a thickness of 0.68 mm, a bulk density of 0.08 g / cm ³ , and a breathability of 430 cm ³ / cm ² · s. Since it was small, the tensile strength was slightly inferior in the vertical direction of 12 N / 5 cm and the horizontal direction of 9.5 N / 5 cm. The toluene adsorption performance was 24 g / m ² , the BET specific surface area was 1350 m ² / g, and the dry basis weight was small, so the toluene adsorption performance was inferior. The bending resistance was 4.8 mN · cm and was flexible. Furthermore, the wearability (dust removal property) was also good.
This fibrous activated carbon double woven fabric is pad-dried in a processing bath containing 3 wt% fluorine-based water repellent (Nuva N2114 manufactured by Clariant Co., Ltd.), and then subjected to fixing treatment at 170 ° C. 1 wt% was added. When this material was immersed in pure water for 1 minute, taken out and dehydrated, the water content of the material was 0%. As a result of evaluating the gas permeation resistance by overlaying the outer layer material on this material, the permeation concentration on the downstream side was approximately 1 ppm, and the gas permeation resistance was slightly inferior.

<Comparative Example 6>
Using Kinoor spun yarn (product number KY-01, count 20 / 2Ne) manufactured by Gunei Chemical Industry Co., Ltd. having a single fiber fineness of 2.2 dtex and a yarn fineness of 590 dtex, a driving density of 43, 43 pieces / 2.54 cm, A double woven fabric of weft 44, 44 pieces / 2.54 cm was woven. This fabric has a basis weight of 435 g / m ² , a thickness of 1.23 mm, a bulk density of 0.35 g / cm ³ , and a breathability of 82 cm ³ / cm ² · s, and a tensile strength of 841 N / 5 cm in the vertical direction and 788 N in the horizontal direction. / 5cm.
The woven fabric was carbonized from normal temperature to 890 ° C. for 30 minutes in an inert atmosphere, and then activated for 90 minutes at a temperature of 890 ° C. in an atmosphere containing 12 wt% of water vapor. The obtained fibrous activated carbon double fabric has a dry basis weight of 260 g / m ² , a thickness of 1.20 mm, a bulk density of 0.22 g / cm ³ , and a tensile strength of 57 N / 5 cm in the vertical direction and 51 N / 5 cm in the transverse direction. However, since the dry basis weight was large, the air permeability was as low as 40 cm ³ / cm ² · s. The toluene adsorption performance was 117 g / m ² , and the BET specific surface area was 1292 m ² / g. However, since the dry basis weight is large, the bending resistance is as high as 11.7 mN · cm, which is inferior in flexibility. In addition, the wearability (dust removal property) was good.
This fibrous activated carbon double woven fabric is pad-dried in a processing bath containing 3 wt% fluorine-based water repellent (Nuva N2114 manufactured by Clariant Co., Ltd.), and then subjected to fixing treatment at 170 ° C. 1 wt% was added. When this material was immersed in pure water for 1 minute, taken out and dehydrated, the water content of the material was 0%. As a result of evaluating the gas permeation resistance by overlaying the outer layer material on this material, it was found that the downstream side permeation concentration was <1 ppm and the gas permeation resistance was high.

<Comparative Example 7>
Using Kinoru spun yarn (product number KY-01, count 20 / 2Ne) manufactured by Gunei Chemical Industry Co., Ltd. having a single fiber fineness of 2.2 dtex and a yarn fineness of 590 dtex, a driving density of 9, 8, 9/2. A triple woven fabric of 54 cm, weft 9, 9, 9 / 2.54 cm was woven. This fabric has a basis weight of 134 g / m ² , a thickness of 1.14 mm, a bulk density of 0.12 g / cm ³ , a breathability of 471 cm ³ / cm ² · s, and a tensile strength of 236 N / 5 cm in the vertical direction and 247 N in the transverse direction. / 5cm.
The woven fabric was carbonized from normal temperature to 890 ° C. for 30 minutes in an inert atmosphere, and then activated for 90 minutes at a temperature of 890 ° C. in an atmosphere containing 12 wt% of water vapor. The obtained fibrous activated carbon triple woven fabric has a dry basis weight of 79 g / m ² , a thickness of 1.1 mm, a bulk density of 0.07 g / cm ³ , and a breathability of 431 cm ³ / cm ² · s, and the tensile strength is vertical. It was 13 N / 5 cm and the weft direction was 15 N / 5 cm. The toluene adsorption performance is 43 g / m ^2, BET specific surface area of those having a 1550 m ² / g and a high adsorption performance, bending resistance was as flexible and 5.1mN · cm. Furthermore, the wearability (dust removal property) was also good. The fibrous activated carbon triple woven fabric was not subjected to water-repellent treatment, and after being immersed in pure water for 1 minute, taken out and dehydrated, the water content of the material was 98%. As a result of evaluating the gas permeation resistance by overlaying the outer layer material on this material, the permeation concentration on the downstream side was> 1 ppm, and the gas permeation resistance was poor.

The fibrous activated carbon multi-woven fabric of the present invention has high breathability, high tensile strength, good handleability, excellent processability such as laminating, and organic per unit area even when wet with water or sweat. It is possible to provide a fibrous activated carbon multi-woven fabric having water repellency excellent in adsorption performance for solvent gas.
Furthermore, it is possible to provide a fibrous activated carbon multi-woven fabric having excellent quality and quality by stable shrinkage even in a continuous carbonization / activation process during industrial production, which greatly contributes to the industry.

1: Upper glass cell 2: Lower glass cell 3: Fibrous activated carbon fabric 4: Outer layer material 5: Paraffin sealing 6: Test solution 7: Sampling port (silicon cap)

Claims (4)

The bulk density is 0.02 to 0.19 g / cm ³ , the dry basis weight is 60 to 250 g / m ² , and the water repellency according to 7.2 water repellency test (spray test) of JIS L1092 (2009) is Fibrous activated carbon multiple fabric characterized by being grade 2 or higher.   The fibrous activated carbon multiple fabric according to claim 1, wherein the tensile strength is 10 N / 5 cm or more.   A protective garment using the fibrous activated carbon multiple fabric according to claim 1.   The method for producing a fibrous activated carbon multi-woven fabric according to claim 1 or 2, wherein a multi-woven fabric comprising yarns of precursor fibers of fibrous activated carbon is carbonized and activated in a batch or continuous manner.